DTC P0111[LF ATX (FN4A-EL), L3 ATX]

id0102b6803600

DTC P0111

IAT sensor circuit range/performance problem
DETECTION CONDITION
•  If intake air temperature is higher than engine coolant temperature by 18 °C {32.4 °F} for 1.2 s with ignition switch on*, the PCM determines that there is a intake air temperature sensor circuit range/performance problem.
*: Ignition switch on when 6 h or more has passed since the previous ignition switch off
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA is available.
•  DTC is stored in PCM memory.
POSSIBLE CAUSE
•  IAT sensor malfunction
•  Poor connection at MAF/IAT sensor or PCM connector
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT POOR CONNECTION OF MAF/IAT SENSOR CONNECTOR
•  Turn the ignition switch off.
•  Disconnect the MAF/IAT sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion.)
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 6.
No
Go to the next step.
4
INSPECT IAT SENSOR
•  Inspect the IAT sensor.
•  Is the IAT sensor normal?
Yes
Go to the next step.
No
Replace the MAF/IAT sensor, then go to Step 6.
(See INTAKE AIR SYSTEM REMOVAL/INSTALLATION[LF, L3].)
5
INSPECT POOR CONNECTION OF PCM CONNECTOR
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion.)
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to the next step.
No
Go to the next step.
6
VERIFY TROUBLESHOOTING OF DTC P0111 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and run the engine under FREEZE FRAME DATA condition.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION[LF, L3].)
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE[LF ATX (FN4A-EL), L3 ATX].)
No
Troubleshooting completed.